铜仁地区烟田土壤的供氮规律

The Laws of Nutrient Supply of the Tobacco Field Soil in Tongren Area

了解与掌握植烟田土壤的供氮规律,研究了常规施肥与优化施肥后土壤碱解氮的供应规律以及烤烟生育期间土壤铵态氮、硝态氮的供应规律,并对其相关指标进行对比。结果表明,优化施肥效果优于常规施肥,优化施肥提高了硝态氮的供应量,更好地促进了烤烟对营养的吸收和生长。研究可以指导铜仁地区烟田制定优化的施肥比例和确定合适的施肥时期。

To understand and master the law of nitrogen supply in the soil of flue-cured tobacco, two treatments including conventional fertilization and optimizational fertilization were applied to analyze the law of nitrogen supply in the soil of fluecured tobacco and the law of ammonium nitrogen and nitrate nitrogen supply, and relative indexes were compared. The results showed that optimizational fertilization increased the supply of nitrate nitrogen and could promote the nitrogen uptake and vegetation growth of flue-cured tobacco. These results were helpful to establishing the optimized fertilizer application ratio and determining the appropriate fertilization time for flue-cured tobacco of Tongren.